<?php

class ItemController extends Controller
{
	/**
	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
	 * using two-column layout. See 'protected/views/layouts/column2.php'.
	 */

	/**
	 * @return array action filters
	 */
	public function filters()
	{
		return array(
			'accessControl', // perform access control for CRUD operations
		);
	}

	/**
	 * Specifies the access control rules.
	 * This method is used by the 'accessControl' filter.
	 * @return array access control rules
	 */
	public function accessRules()
	{
		return array(
			array('allow',  // allow all users to perform 'index' and 'view' actions
				'actions'=>array('index','view'),
				'users'=>array('*'),
			),
			array('allow', // allow authenticated user to perform 'create' and 'update' actions
				'actions'=>array('create','update','form','autoCompleteCodeList','autoCompleteNameList','billOfMaterials', 'batches'),
				'users'=>array('@'),
			),
			array('allow', // allow admin user to perform 'admin' and 'delete' actions
				'actions'=>array('admin','delete'),
				'users'=>array('admin'),
			),
			array('deny',  // deny all users
				'users'=>array('*'),
			),
		);
	}
	
	public function actionBatches($itemId)
	{
		$batches = InventoryBatch::model()->findAll('item_id=:itemId', array(':itemId'=>$itemId));
		
		$item = Item::model()->findByPk($itemId);
		
		$this->render('batches', array('batches'=>$batches, 'item'=>$item));
	}
	
	public function actionBillOfMaterials($itemId)
	{
		$model = Item::model()->findByPk($itemId);
		
		$bom = new BillOfMaterials;
		$componentList = $bom->buildBillOfMaterials($itemId);

		$itemList = Item::model()->findAll();
		
		$item_codes[] = '';
		$item_names[] = '';
		
		foreach ($itemList as $item)
		{
			$item_codes[$item->id] = $item->code;
			$item_names[$item->id] = $item->short_description;
		}
		
		$this->render('viewBillOfMaterials', array('model'=>$model, 'componentList'=>$componentList,
														'item_codes'=>json_encode($item_codes),
														'item_names'=>json_encode($item_names)
														));
	}

	/**
	 * Displays a particular model.
	 * @param integer $id the ID of the model to be displayed
	 */
	public function actionView($id)
	{
		$this->render('view',array(
			'model'=>$this->loadModel($id),
		));
	}
	
	public function actionForm()
	{
		if (isset($_POST['form_action']))
		{
			$action = $_POST['form_action'];
			$items = $_POST['item'];
			
			if ('delete' == $action)
			{
				foreach($items as $itemId)
				{
					$itemObj = $this->loadModel($itemId);
					$itemObj->delete();
				}
				
			}
			elseif ('stockadjustment' == $action)
			{
				$direction = $_POST['direction'];
				$amount = $_POST['change_amount'];
				$item_id = $_POST['item'];
				
				if ('decrease' == $direction) $amount = $amount * '-1';
				
				$itemQuantity = ItemQuantity::model()->findByPk($item_id);
				
				$itemQuantity->adjustQuantity($amount);
				
				$this->redirect(array("item/view/id/{$item_id}"));
				
			}
			
		}
		
		$this->redirect(array('inventory/items'));
	}

	/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate()
	{
		$item = new Item;
		$inventoryBatch = new InventoryBatch;
		
		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Item']))
		{
			$item->attributes=$_POST['Item'];

			$inventoryBatch->newManualEntry($_POST['InventoryBatch']);

			$valid = $item->validate();

			if ($valid)
			{
				$transaction = $item->dbConnection->beginTransaction();
				
				$item->save(false);
				
				try {
					$inventoryBatch->item_id = $item->id;
					$inventoryBatch->save(false);
				
				}
				catch (Exception $e)
				{
					$transaction->rollBack();
					
				}
				
				$transaction->commit();
			
				Yii::app()->user->setFlash('notify',"<h3>Your item has been created.</h3>");
				$this->redirect(array("item/update/id/{$item->id}"));
				$this->refresh();
				
			}

		}

		$this->render('create',array(
			'item' => $item,
			'inventoryBatch' => $inventoryBatch,
			'itemCost' => $itemCost
		));
	}

	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 * @param integer $id the ID of the model to be updated
	 */
	public function actionUpdate($id)
	{
		$item = $this->loadModel($id);
		$itemQuantity = ItemQuantity::model()->findByPk($id);
		$itemCost =  ItemCost::model()->findByPk($id);

		if(isset($_POST['Item']))
		{
			$item->attributes = $_POST['Item'];
			$itemQuantity->attributes = $_POST['ItemQuantity'];
			$itemCost->attributes=$_POST['ItemCost'];
			
			$valid = $item->validate();
			
			if ($valid)
			{
				$transaction = $item->dbConnection->beginTransaction();
				
				$item->save(false);
				
				try {
					$itemQuantity->item_id = $item->id;
					$itemQuantity->save(false);
				
				}
				catch (Exception $e)
				{
					$transaction->rollBack();
					
				}
				
				try {
					$itemCost->item_id = $item->id;
					$itemCost->save(false);
					}
				catch (Exception $e)
				{
					$transaction->rollBack();
					
				}
				
				$transaction->commit();
			
				Yii::app()->user->setFlash('notify',"<h3>Your item has been updated.</h3>");
				//$this->refresh();
				
			}
			else {
				echo "not valid";
				exit;
			}

		}
		
		$this->render('update',array(
			'item'=>$item,
			'itemQuantity' => $itemQuantity,
			'quantityDecimals' => $quantity_decimals,
			'itemCost' => $itemCost
		));
	}

	/**
	 * Deletes a particular model.
	 * If deletion is successful, the browser will be redirected to the 'index' page.
	 * @param integer $id the ID of the model to be deleted
	 */
	public function actionDelete($id)
	{
		if(Yii::app()->request->isPostRequest)
		{
			// we only allow deletion via POST request
			$this->loadModel($id)->delete();

			// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
			if(!isset($_GET['ajax']))
				$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
		}
		else
			throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
	}

	/**
	 * Lists all models.
	 */
	public function actionIndex()
	{
		$dataProvider=new CActiveDataProvider('Item');
		$this->render('index',array(
			'dataProvider'=>$dataProvider,
		));
	}

	/**
	 * Manages all models.
	 */
	public function actionAdmin()
	{
		$model=new Item('search');
		$model->unsetAttributes();  // clear any default values
		if(isset($_GET['Items']))
			$model->attributes=$_GET['Items'];

		$this->render('admin',array(
			'model'=>$model,
		));
	}

	/**
	 * Returns the data model based on the primary key given in the GET variable.
	 * If the data model is not found, an HTTP exception will be raised.
	 * @param integer the ID of the model to be loaded
	 */
	public function loadModel($id)
	{
		$model=Item::model()->findByPk((int)$id);
		if($model===null)
			throw new CHttpException(404,'The requested page does not exist.');
		return $model;
	}

	/**
	 * Performs the AJAX validation.
	 * @param CModel the model to be validated
	 */
	protected function performAjaxValidation($model)
	{
		if(isset($_POST['ajax']) && $_POST['ajax']==='items-form')
		{
			echo CActiveForm::validate($model);
			Yii::app()->end();
		}
	}
}
